Hi, I know there's a fix for this problem when modifying the BIOS, but I don't want to go down that route. I wasn't able to find a fix for the sleep problem using VistaLoader on the P35-DS4 Rev 2 Activation has been done through VistaLoader 2.1.3 (used voatk tools to remove previous activation). Any ideas? Edit: For those of you that don't know about the sleep problem: basically after you put the computer into sleep, or hybrid sleep Vista is not activated any more, a reboot is required to re-activate which defeats the purpose of sleep mod. Thanks.